Bell in Vacuum, Glass, DC Subcategory_Lab Burner Accessories letting electrophoresis setups switch between

letting electrophoresis setups switch between short and long separation runs on a single supply

Pack of 5 rubber pipette bulbs in 5mL capacity provides suction control for precise volumetric transfer and pipetting in laboratory applications

Air-cooled rheostat with extended-tube ventilation

this clear dial provides a readable face for measuring angular displacement in physics setups

Carbon anode-and-cathode pair pre-fitted in a rubber bung

Bell in Vacuum, Glass, DC Subcategory_Lab Burner Accessories letting electrophoresis setups switch betweenBell in vacuum jar with a 4 6V electric bell suspended on rubber cord inside a 22 by 15cm glass chamber, illustrating that sound cannot travel without air.